Blade sharpener



KlLlA BLADE SH NER Filed June 19, 1946 VENTOR,

Patented Oct 9, 1951 i This invention relates to blade Sharpeners and more particularly to apparatusfor sharpening blades used onknives.

' .--I-t'-is' an object of the invention to provide a rotary' sharpening stone or the like which is made up;-o"f at-least a pair ofspl-it'se'ctions which are rotatable relative to each other, and wherein means is provided for shifting one section about its-rotational axis relative'to the other,the shifting movement bringing different relative portions 0f-fthe two sections together and maintaining roundnessof the stone. P it is another object of my invention to provide knife sharpening apparatus which includes a pair movable closure shown rinsclosede-and opened po -iz sitigns in-; f lisandidotted rlinesirespeotiv 1 Figure 2; s side view, eithezcasing Figure 3 visi-an enlarged plamview ratus vith the casing:inisection;:. fi ure-4 11813111 enlargedfiragmentary .sectionalview throngh'a formzofisharpeningzwheet spindle;

the appa- 45 Figu 's-a fragmentary detaihimfrohtielevatip he'end zofimtherspindle; section shown 50 'th the,coveri platez'removed; V

Jerome JFK ian, Minneapolis,

4, 2 F gurefi is a sectionftaken approximately on he IiI-ie 8 3 Of gl'1Ie'-6 ure 9 -is' "front el'e'vational view of a modifica lQl'lSlfOWiHg '"a formof mechanism 'for shift in'gfohese'ction of a"grinding wheel relative to -a cooperating-sectionthereof with; the -cver-p1ape of the shifting mechanism removed j: and- T '-Figur -10 is" an=en1arge'd*se ction ween e proxi: matel'y'on the-line Ill-+1901 Figure 9. 1 I In' Figure 3* there is shown the lower-portion l l of aiicas i-ng C. Within the casing portioif li' is suitably iiiouiited a base plate -i 2 having a V shaped' notch I3 formed therein.- "A hearing bracket? l4':i"smounted"on the base' plate i2 and of cooperating frusto conical rotary sharpening itilcontains a bearing sleeve 15 Wh'ich rotatably units having their-circularboundary surfacesin supports 'a' drive "shaft i6 efitendingoutwardly of contact with a driveconnection; to onesharpen themcasingv portion" I I: and L adapted to' be can: unitythe movement of-the rotary-unit floeing nectedfto'a suitab'le 'power unitslich 'as an electric imparted 'to the other sharpening qinit by-such motor; A housing ma is 'illu'stra'ted in Figure 4 fnictionalcontactahd whereiir- 'each-sharpenin' anctiisfshown'having a bore]? extending inwardunitris formed-'in-two seotions so interconnectedlysfrom theen'dthereof to -slidabl-y receive are that:one section will -rotate-relativdtqthe other tary stub shaft it whic'h is normally urged outperiodically to2maintain roundnessmf h s hai j-j wardlyz-by ac compression spring [9. The stulo eningunitg .1 cans: y h shaft! fits into'a cup-zflformed inaportion ofa further object of the invention is-to provide c-yhndricabelement2|; "The bottom ofthe cup sharpeningaapparatus vliinciudir-ig' rotari -stones 20 is prOVided'With'a sIQt'22-to receive a key 23 which are adaptedeto run-ins anzoil bath and -a formed" on: the weird I of' -the stub shaft l8; 3 A casing therefor which provides a guard against sharpening stone section 32 is mounted on-the wifleiepreadesplattering, :ofa oil'l.:pickedmp by the member-v21: for lrotati'on'therewith. The outer o v. V gm: J1" z, z: v war endsof the member-fil=-is provided with'a kerf'or present invention 15- 11 im rovement, on 510E525 :in Which is slidably mounted a 'dog '25.- the tructure ShQWn11a;nd descpib mi i i Abouttheputerend of the member 2| is an annu t t b 12,3 2, 99; ig w qov 4,14 larinternai ratchet element 2? havin'grece'sses 28 k2- adaiptedi toremovablyreceive the ends-of the slid H eaboveand other obJects andadvantages-oi 35 blefdog 26.5 A: cover 29 retainsth'e slidable do the invention will;moreiiullmappeanfromatheiole fi a gainst =r p ceme b' f o t e kerf'or groove W n Q p i0n:made:inazconnectionawith.Kthe- 5 on he end of:themember=2'l. A second grind-- w mpa y ngi drawings;v wherfiizniilikeiirefietenfi' n'g Wheel section 33 is mounted-one collar at to charactersreier tothesame partstthroughout-"th' 1 which the annular ratohet'2'i is secured. Whenvifiil lfirhndfinwhichr 1; 40 th Mme-32:, 33j-is*started and stopped frOn'I-tim'e-to' FigUrQ I i a plan view of th casing thth time-in sharpening difierent elements the-slidable dog 2 Bzjw-i-ll at times tend-to centeritself more-or less=in1thes1ot or kerf 25 in the member 21 andwhen :the sharpenenisagainstarted the dog 26 may-vfind-its way into a'riyl'or'ie of the sockets '28 lfor-med. i the member 2-155 As -a' result the *two sharpeninglwheel:sections 32 and 33 areperiodi' otherl about "their cally shifted relative tor-each commonnrotational axis.* h

There is a second pair of sharpening elements forming a .wheeliand-s-hown at 24 and-305; The

sections 24= and-'30 are-"mounted on the'dr'i e shafti l6; -;Wi th amne Way clutch arra showni Figure's'aiid 51 stantially frusto-conical and that the circular boundary surfaces of the two wheels are in contact with each other as at 35. When the power shaft I6 is rotated the left hand wheel unit will frictionally drive the right hand unit and the rotation is such that the left hand wheel unit is run counterclockwise as viewed in Figure 3, and the right hand wheel unit is given a clockwise rotational movement.

A bearing housing I6a which supports the stub shaft |B on which the right hand grinding wheel unit is mounted, is connected to and beneath a tubular housing 36 as shown in Figures 3 and 6.

The tubular housing 36 has an inwardly concentric tubular element 31 shown in Figure 6, the interior wall of said element 31 being threaded as shown. Slidably fitting between. the outer:

tubular casing 36 and the inwardly concentric tubular element 31 is a tubular element 38, and, as shown in Figure '7, the elements 36, 3'! and 38 are square in cross section. The intermediate tubular element 38 extends to the right as viewed in Figure 6, and through a mounting bracket 39 formed in the right hand side of the base plate l2, as indicated in Figure 3. A partially threaded rod 49 extends into the right hand end of the intermediate tubular element 38 and is received by the internally threaded inner tubular element 31. A flange 4| on the threaded rod 49 abuts against an internal flange 42 formed inside the intermediate tubular member 38 adjacent the right hand end thereof and a threaded cap 43 is screwed on the right hand end of the intermediate tubular element 38 to retain the threaded rod 46 against endwise movement. A suitable knob 44 is mounted on the outwardly extending right hand end of the rod 40. When the knob 44 and rod 40 are rotated the inner and outer tubular elements 31 and 36 and the housing l6a. which supports the stub shaft IE will be moved longitudinally of the threaded rod 40 and intermediate tubular element 38. A set screw 45 is threaded through the outer tubular element 36 to releasably engage the intermediate stationary tubular element 38..

In Figures 9 and 10 there is shown another embodiment of the invention including a sharpening wheel unit made up of a pair of sections 46 and 41 which are comparable to the sharpening wheel sections 36 and 24 respectively. A shaft 48 corresponding to the drive shaft l6 extends through the two wheel sections and lies in a cuplike element 49 to which it is keyed as indicated at 50. Keyed to the outer end of the cup-like element 49 is a gear A sleeve 52 has the wheel section 46 keyed thereto and said sleeve 52 is rotatable relative to the cup-shaped element 49 upon which it is mounted. The outer end or the sleeve 52 is keyed to a gear 53 which lies beside and is the same diameter as the gear 5|. An idler gear 54 of twice the thickness of the gears 5| and 53 is meshed with both of said gears and it runs upon a pin 55 mounted between a pair of plates 56 and 57 relative to which the sleeve 52 and member 49 are rotated. The pin 55 upon which the idler gear 54 is rotatable has one end anchored in a rod 58 which, as shown in Figure 9, is of sufficient length to engage the bottom of the casing section II.

It should be clearly understood that the gears 5| and 53 do not have the same number of teeth, it being preferred that one of said gears have one tooth less than the other. Consequently, when the shaft 48 is rotated it will tend to rotate the idler gear 54 with a planetary action, but the latter action is prevented by the rod 58 50 that the idler gear 54 will have its rotational axis maintained in a stationary position. The gear 5| is driven directly by the cup-shaped element 49 on the drive shaft 48. This gear will rotate the idler 54 and it in turn will rotate the gear 53 on the sleeve 52. The latter sleeve will rotate the grinding wheel 46 while the cup-shaped element 49 on the drive shaft 48 will rotate the grinding wheel section 41. The wheel sections 46 and 41 will by reason of their frictional contact with a complementary wheel unit similar to that in Figure 3 impart rotary motion to said such complementary wheel sections.

In Figures 1 and 2 the casing portion II is shown provided with cover sections 59 at the ends thereof separated by an opening 60 which can be closed by a pair of closure elements 6|, said elements being hinged as shown at 62. It will be noted that the closure elements 6 l, as shown, are generally trough-shaped and, as best indicated in Figure 2, the troughed-portion faces inwardly and downwardly when the closures are in casing closing position. When the closures are swung to the open dotted line position indicated in Figure 1 the bight between the two grinding wheel units is exposed so that the knife blade can be placed edge downward and into the bight. When the two wheel units are rotated, the left hand unit in Figure 3 in a counterclockwise direction and the right hand unit in a clockwise direction, the complementary sharpening surfaces of the two stone units will move upwardly and sharpen both sides of the knife edge.

I The compression spring l9 in the socketed end of the housing |6a supporting the right hand grinding unit of Figure 3 tends to force the grinding or sharpening unit axially outwardly so that there will be a proper frictional enknob 44 and threaded rod 40 to move the entire bearing mounting of the housing I60. to the left or toward the left hand grinding wheel unit.

In Figure 3 there is shown a block 65, preferably of a fibrous material. It is pivotally connected at 66 to an arm 61. The latter is provided with a slot 68 to receive a pin or stud 69 which is mounted in the base plate l2. The block 65 has a V-shaped notch 16 to permit'the block to lie against adjacent outer side surfaces of the sharpening wheel sections '24 and 32. A tension spring H connected between the arm 61 and an anchoring pin 12 on the base plate 12 keeps the block 65 in engagement with said sharpening Wheel sections. The pivotal mounting of the block 65 and the slot and pin connection 68, 69 permit the block to assume different positions and follow the sharpening wheel sections as they wear and/or are adjusted.

The block 65 serves as a wiper to keep oil from spattering and also provides a stop to prevent the insertion of a knife blade in the bight at the under sides of the sharpening wheels.

It is important to note the one way clutch of Figures 4 and 5, and the transmission gear arrangement of Figures 9 and 10. These structures, as stated above, permit relative rotary movement of one grinding Wheel section to its complementary section. With grinding or sharpening wheels formed in one piece it is practically impossible to operate one piece stones without having them soon become out of round.

rangement and proportions of the various parts without departing from the scope of my invention.

What I claim is:

1. In a blade sharpener, a pair of rotary sharpening units having contacting circular boundary surfaces, one of said units having a drive connection, the other of said units being driven through its contact with said first mentioned unit, at least one of said units being formed in a pair of coaxial sections having a connection between them, and said connection including means for rotationally shifting one section relative to the other.

2. The structure in claim 1, and one of said units being mounted on a support upon which it is axially shiftable relative to the other of said units.

3. The structure in claim 1, and one of said units being mounted on a support upon which it is shiftable to move its circular boundary surface toward the boundary surface of the other in a direction normal to a plane commonly tangent to said surfaces at their point of contact.

4. In a grinding device, a wheel support, a pair of coaxial grinding wheel sections carried by the support and individually rotatable one relative to the other, each of said sections having a frusto-conical shape and being of complementary relative sizes, the bottom of the smaller section being adjacent the top of the larger section and forming a continuous frustoconical wheel, drive means for the wheel sections, the wheel sections having a positive connection between them, the connection including means for rotationally shifting one section relative to the other section.

JEROME J. KILIAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 108,822 Pitkin et a1. Nov. 1, 1870 425,628 Perry Apr. 15, 1890 726,794 McLeran May 5, 1903 1,198,646 Maddox Sept. 19, 1916 1,243,241 Ames Oct. 16, 1917 1,414,172 Brown Apr. 25, 1922 1,767,091 Millsap June 24, 1930 1,316,090 Page July 28, 1931 1,909,953 Heald May 23, 1933 1,925,108 Nagy 1 Sept. 5, 1933 1,952,653 Brown Mar. 27, 1934 1,963,394 Yassenoff June 19, 1934 2,153,275 Schulze Apr. 4, 1939 2,177,025 LaChapelle Oct. 24, 1939 2,197,119 Barsch Apr. 16, 1940 2,228,385 Burns Jan. 14, 1941 2,298,496 Metzger Oct. 13, 1942 2,322,727 Cole et al. June 22, 1943 2,362,699 Kilian Nov. 14, 1944 FOREIGN PATENTS Number Country Date 311,731 Great Britain May 15, 1930 

